In the body, melatonin is involved in the natural sleep cycle. Up and upMelatonin may be a terrific choice for people experiencing occasional sleeplessness, those with jet lag, or anyone seeking to promote relaxation and restful sleep. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Size: 240. Gender: Unisex. Age Group: Adult.